answer asap plss, in a steel factory, iron is melted. then, other elements, such as carbon and nickel, are added to the melted iron to make steel. what is the reason for melting the iron

Balance this equation: n2 + h2 > nh3, write the following molar ratios: n2 / n2 / nh3 h2 /

What happens when the temperature of a solution increases?

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?